One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

A museum dedicated to Nantucket's legacy as the "graveyard of the Atlantic."

Hut with supplies for shipwreck survivors.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

The only remaining place where you can play this century-old game for cash.

The resting place of a Civil War celebrity's amputated limb.

The unbelievably opulent home built for an infamous newspaperman.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The ghostly remains of an accidental sea.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

This small-town pizzeria won the Hollywood lottery.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Hear the quietest sound from across the dome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Looking for a unifying history, Uzbekistan finds its answer in a 14th Century Turco-Mongol conqueror... despite the fact he wasn't Uzbek.

One of the most ethnically diverse spots on the planet.